北米掘削トップ企業
-
Schlumberger Limited
-
Baker Hughes Company
-
Chevron Corporation
-
ConocoPhillips
-
Halliburton Company
*免責事項:上位企業は順不同
Schlumberger Limited
Baker Hughes Company
Chevron Corporation
ConocoPhillips
Halliburton Company
*免責事項:上位企業は順不同